One-pot functionalisation of <i>N</i>-substituted tetrahydroisoquinolines by photooxidation and tunable organometallic trapping of iminium intermediates
作者:Joshua P Barham、Matthew P John、John A Murphy
DOI:10.3762/bjoc.10.316
日期:——
stabilised carbon nucleophiles. The few reports of organometallic additions have limited scope of substrate and organometallic nucleophile. We report a novel, one-pot methodology that functionalises N-substituted tetrahydroisoquinolines by visible light-assisted photooxidation, followed by trapping of the resultant iminium ions with organometallic nucleophiles. This affords 1,2-disubstituted tetrahydroisoquinolines
No photocatalyst required – versatile, visible light mediated transformations with polyhalomethanes
作者:Johannes F. Franz、Wolfgang B. Kraus、Kirsten Zeitler
DOI:10.1039/c4cc10270c
日期:——
Visible light activation of polyhalomethanes offers a versatile, photocatalyst-free method for the α-CH functionalization of amines and for regioselective Kharasch-type additions.
positions, the order of the activity was ortho > meta > para. It was concluded that the target compounds represent a class of novel promising candidates or lead compounds for the development of new tetrahydroisoquinoline acaricidal agents.
CBr<sub>4</sub> as a Mild Oxidant‐Enabled Oxidation of a <i>sp</i><sup><i>3</i></sup> C−H Bond: A Facile Synthesis of the Persistent Iminium Salts of Tetrahydroisoquinolines
A C−H bond oxidation of THIQs was achieved by CBr4 initiated reaction conditions, providing a series of the persistent iminium salts of THIQs in high yields with good functional group tolerance. These iminium salts can be readily applied to the synthesis of the functionalized THIQ derivatives.